2 toons gear deleted

Hello, I recently came back to WoW after a couple years of being in the military and haven't had time to play the game, as I came back i was only playing on my Hunter, but when i switched to my warlock and my DK, i noticed the items i had equiped that disappeared, either vendored, deleted or disenchanted,
I do NOT share my account/password with anyone as i have way too much money invested in my account. and it does not makes sense as my others characters were intact, only 2 of them got ''cleaned'', the bank and inventory also got cleaned, but i dont really care about that, i only care about the gear i had. For the meantime i bought some blues and greens so i can do some stuff on them on the meanwhile. Also what was weird is that my shadowmourne was still intact and not deleted, which i appreciate of.

I am pretty sure i have it backed up since i think i remember doing my weekly backups prior to that happening,
if i could get any help of some sort i would gladly appreciate it.

Warlocks name: Tansei

Death Knights name: Tsuni